By Carl J. Hansen
The?rsteditionofthistextappearedin1994.Shortlyafterthethirdprinting, our editor advised that we try a moment variation simply because new devel- mentsinstellarstructureandevolutionhadmadeouroriginalworkoutdated. We (the unique authors, CJH and SDK) reluctantly agreed yet with res- vations because of the e?ort concerned. Our preliminary reluctance disappeared after we have been capable of persuade (cajole, twist the arm of, etc.) our new coauth- colleague Virginia Trimble to hitch us. (Welcome Virginia!) We (i.e., all 3 people) desire that you just agree that the current variation is a smart development in comparison to the 1994 e?ort. Our pursuits during this variation are an analogous ones we set forth in 1994: Whatyouwill?ndisatextdesignedforourtargetaudience:thety- cal senior undergraduate or starting graduate scholar in astronomy or astrophysics who needs an outline of stellar constitution and e- lution with barely enough aspect to appreciate the overall photo. he or she can move on from there to extra really good texts or on to the study literature counting on expertise and pursuits. To this finish, this article provides the elemental actual rules with out chasing all of the (interesting!) information. For these of you conversant in the ?rst variation, you'll ?nd that a few issues haven't been replaced considerably (F = ma remains to be F = ma), whereas othersde?nitelyhave.Forexample,Chapter2hasbeencompletelyrewritten.
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